Gas-consumer for furnaces.



A. GRAF.

GAS CONSUMER FOR FURNACES.

APPLICATION FILED mm 28. l9l8.

Patented Dec. 31, 1918.

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A. GRAF.

GAS CONSUMER FOR FURNACES.

APPLICATION FILED MAR 28. 191B.

LQSQAWO Patented Dec. 31,1918.

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against the bottom of the boiler.

METER STATES FATENT @FFTQE.

ANTON GRAF, 0F WORCESTER, MASSACHUSETTS.

GAS-CONSUMER FOR FURNACES.

Application filed March 28, 1918.

To all whom it may concern:

Be it known that I, ANTON GRAF, a citizen of the United States, residing at lVorcester, in the county of Worcester and State of Massachusetts, have invented new and useful Improvements in Gas Consumers for Furnaces, of which the following is a specification. 2

This invention is an improvement ingas consumers for furnaces and relates more 'particularly to devices for perfecting the combustion of gases in the combustion chamber. V i

In the burning of coal or other solid fuel a large part of the available heat energy is given off as various gases which, if unburned, do not yield up their heat, and in order to prevent this loss I provide means for creating a sheet or curtain of air and steam through which the gases must pass before they leave the combustion chamber. To attain this result I employ a series of j ets or nozzles located on the bridge wall and arranged with no structure between the jets and the boiler, said jets being arranged on an arc of a circle, concentric with the boiler and having outlets arcuate in cross-section, which outlets are directed upwardly and rearwardly so as to produce a parti-conical curtain or sheet of air and steam directed I have found in practice that it is advantageous to arrange a bafile wall near the rear of the boiler so arranged as to require the gases and the steam and air to pass downwardly from vthe bottom of the boiler before they leave the combustion chamber.

With these and other objects in view, which will appear as the description proceeds, my invention resides in the combination and arrangement of parts disclosed herein and claimed hereafter.

. In the accompanying drawings. wherein similar parts are indicated by like reference characters, v

Figure 1 i a vertical central section of a furnace embodying my invention,

Fig. 2 is a vertical section taken on line 2-2 of Fig. 1,

Fig. 3 is a side elevation of the preferred form of jet,

Fig. 4 is a rear view of the jet shown in Specification of Letters Patent.

Patented Dec. 31, 1918.

Serial No. 225,226.

Fig. 5 is a side elevation of a modified form f jet,

Fig. 6 is a rear view of the modified form of jet,

Fig. 7 is a diagrammatic view showing the outlet in the preferred form of jet, the jet being seen from the rear of the furnace,

Fig. 8 is similar to Fig. 7, showing the modified-form f jet, and

. Fig. 9 is .a reduced section on line 99 oflFig. 1, showing a modified form of battle wa l. v 1 I Referring to the drawings, 10 indicates the boiler resting upon any approved form of setting 11 having a fire-box 12 with grate 13 and ash pit 14. The usual chimney 1 5, steam dome 16, bridge wall 17, andcombus tion chamber 18 are provided.

,Located at the top of bridge wall 17 and embedded therein is a pipe 19, the uter end of which carries a bell 20 the top of which is open to the air. An injector 21 is mounted in the bell and receives steam from the dome 16, by means of which pipe 19 receives air and steam. Threaded into pipe 19 is a series of nozzles or jets 22 (one only of which is shown in Fig. 1), having outlets 23, which face rearwardly and upwardly of the boiler. tops of these nozzles project somewhat above the bridge wall, but I do not wish to be limited to this construction as any arrangement which will permit the air and steam to pass from said nozzles rearwardly and upwardly is within the scope of my invention.

As shown in Figs. 4 and 7 the 0utlet'23 is curved, being preferably arcuate convexly with respect to the boiler, while Figs. 5, 6 and 8 show outlets arcuate concavely with respect to the boiler. Either construction provides a series of arcuate outlets arranged on an arc so that the mixture of air and steam issuing from the outlets forms a sheet or curtain, which is part of a hollow cone .the axis of which is substantially the axis of the boiler. This form of curtainis' produced by having the'tops of the jets at a slight angle, as shown in Fig. 1, so that the air and steam is directed rearwardly from the bridge wall and upwardly to the bottom of the boiler, thus requiring the gases to pass through the air and steam to insure perfect combustion. Itwill be noted thatwhere As shown in the drawings, the

- the jet as indicated in Fig. i is used a larger area of contact with the gases is provided. Also, the entire bottom of the boiler is exposed to the fire-box and combustion chamher, there being no walls or other heat in sulating structure to absorb heat and shield a portion of the boiler, in this way letting the gases be acted upon by the air and steam without being interfered with by brick work between the boiler and bridge wall. Again, the jets are equidistant from the boiler, insuring uniform heating and assisting the draft instead of obstrucing it, as in some proposed furnaces. By making the face of the jet as shown in Fig. 4 con-cave the air and steam issues therefrom more compactly and with less spreading than is the case with the jet shown in Fig. 6, where the face is convex. I 7

It is general experience that the hottest part of the gas flame is somewhat above the point where the gases and oxygen unite andit is with this in mind that the baffle walls are constructed so that the flames may reach upwardly and have the hottest parts thereof strike the boiler. Therefore, located at the rear of the boiler is a baffle wall indicated in Fig. 1 at 25, having an outlet 26 at the bottom thereof spaced from the boiler, said baffle wall being so, constructed as to require gas, smoke, and steam and air to pass through the outlet 26 as indicated by the arrows in Fig. 1, thus further insuring the mixing of the gases and air. Reference to Fig. 2 shows the bafliewall -25 as extending downwardly from the boiler to the bottom of the combustion chamber,

7 the outlet 26, shown in dotted lines, being formed centrally thereof-and in the lower part of said baflie wall. In smaller boilers it maybe desirable to employ a bafiie wall 2'2 constructed as indicated in- Fig. 9, said bailie wall being substantially concentric with the boiler.

Actual tests show that the employment of my improved jets and the baffle wall, when added to ordinary boilers, increases the amount of water evaporated in the boiler and decreases the amount of coal consumed.

What I claim is:

1. A gas consumer for furnaces comprising a boiler, a bridge wall the top of which is substantially concentric with the boiler, a series of spaced jets arranged on the bridge wall, means to supply a mixture of steam and air to said jets, the jets having arcuate outlets substantially concentric with the boiler and opening toward the rear. of the boiler, and a rear baffle wall extending downwardly from the boiler andhaving the bottom thereof substantially concentric with the boiler, said jets facing, upwardly and rearwardly to direct the mixture of steam and air against the boiler in front of the baflie wall, whence said mixture and the gases pass downwardly under said baffle Wall.

2. A gas consumer for furnaces comprising a boiler, a bridge wall the top of which is substantially concentric with the boiler, a series of spaced jets arranged on the bridge wall, means to supply -a mixture of steam and air to said jets, the jets having arcuate outlets opening toward the rear of the boiler, and a rear baflie wall extending downwardly from the boiler and having the bottom thereof substantially concentric with the boiler, said jets facing upwardly and rearwardly to direct the mixture of steam and air against the boiler in front of the baflie wall, whence said mixture and the gasfis pass downwardly under 7 said baffle wa 3. A gas consumer for furnaces comprising a boiler, a bridge wall the top-of which is formed'on an arc of a circle substantially concentric with the boiler, a series of spaced jets arranged on the bridge wall,,said jets having upwardly and rearwardly extending faces provided with arcuate openingsallof which lie on an arc substantiallyrconcentric with the boiler, a rear baflie wall extending downwardly from the boiler and having'the bottom substantially concentric with the boiler, and means to supply the jets with a mixture of steam and air which issue from said spaced jets toward the boiler and is then directed downwardly to pass under the 4;. In a gas consumer for furnaces comprising a boiler, a bridge wall substantially concentric therewith and a rear bafiie wall depending from the boiler and having the ing face formed as a part of a cylinder'and having therein an openinghaving opposite edges substantially concentric with the boiler, and means to supply said jets with a mixture of steam and air. 4

5. In a gasconsumer for furnaces co prising a boiler, a bridge wall substantially concentric with the boiler and a rear'bafiie wall depending from the boiler and having the bottom thereof substantially concentric with the boiler, the combination of a pipe embedded in the bridge wall and constituting a supply of steam and air, and a series of jets, each having a straight shank to connect with the said pipe and having the upper portion thereof offset, said ofi'set portion,

edges of which are substantially concentric boiler, the top of the bridge wall, the supply 10 with the boiler. pipe, the outlets in the jets and the bottom 6. A gas consumer or furnaces compris of the bafile Wall all being substantially coning a boiler, a bridge wall, a pipe in said centric with the boiler. bridge wall to supply a mixture of steam Signed at Worcester, county of Worcester and air, a series of jets connected to said and State of Massachusetts, this 25 day of 15 pipe and having rearwardly extending faces March, 1918. provided with arcuate outlets, and a rear bafile wall extending downwardly from the ANTON GRAF.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

